HobbyCNC

PRO Chopper Driver Board

The final step is one of the most important. Clean the PC board with an alcohol or flux remover, or if you used a solder with a water soluble flux, warm water. Carefully inspect all solder connections with a magnifying glass looking for solder bridges or cold solder joints. This step will eliminate almost all possibilities of initial board failures.

The solder we prefer to use is a Water Soluble Core Solder from Kester. The residues are rinsed off with standard tap water and leave a perfectly clean board. The model of solder is Kester part number 24-6337-6403.

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